43280

Appears in sequences

• Number of 4-unbalanced strings of length n (=2^n-A027559(n)).at n=16A027561
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 26.at n=15A031704
• Number of square binary matrices with n ones, with no zero rows or columns, up to row and column permutation.at n=13A057151
• Poincaré series [or Poincare series] P(C_{3,2}(0); t).at n=35A124636
• In the "3x+1" problem, let 0 denote a halving step and 1 denote an x->3x+1 step. Then a(n) is obtained by writing the sequence of steps needed to reach 1 from 2n+1 and reading it as a decimal number.at n=3A125710
• a(n) = 64*n^2 + 16.at n=25A157912
• a(n) = 676*n^2 + 2*n.at n=7A158385
• a(n) = 256*n^2 + 16.at n=13A158574
• a(n) = 169*n^2 + n.at n=15A173275
• Triangle read by rows: T(n,k) is the number of cycle-up-down permutations of {1,2,...,n} having k cycles (1<=k<=n).at n=46A186366
• Sum of the largest parts in the partitions of 4n into 4 parts with smallest part = 1.at n=23A240711
• Numbers k such that Bernoulli number B_{k} has denominator 230010.at n=15A295593
• Number of triangles in a Star of David of size n.at n=16A299965
• Number of non-isomorphic connected multiset partitions of weight n into singletons or pairs.at n=16A368726